BIOS not detecting notebook hard drive after setting default BIOS settings.

I had my Ubuntu 14.04 installed in my laptop in a drive named "Notebook hard drive" in addition to a pre-installed Windows 8. Today I set the default BIOS settings in my laptop and when I rebooted it and tried to use Ubuntu by pressing "F9" key and choosing from the BIOS menu I found my "Notbook hard drive" option missing. My Ubuntu drive is still there but I have no way to access it. Is there any way I can get it back to working?
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Try disabling secure boot in the BIOS and then restarting the notebook.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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